Combination lock



Feb. 1o, 1925. "1,525,954

H. ROMANO COMBINATION LOCK Filed' oct. 29. 1925 /lllllll/f' sia/4" Patented Feb. 10, 1925.

HANNIBALE ROIVLINO, 0F SHELTON, CONNECTICUT.

COMBINATION' LOOK.

Application led October 29, 1923. Serial No. 671,366.

i lock, and has for an object to provide a lock of this character Which Will be very simple in construction requiring a minimum number of parts, and one which cannot be easily l Y picked.

VIt fis also ano-bject of the invention to lprovide a lock in which a large number of d'ilferent combinations may be secured, and

' f one in which the combination is very easily changed.

WWVith these and other objects in view, I

' have devised the construction illustrated in the accompanying drawing forming a part this specification, similar reference characters being employed throughout the various figures to designate corresponding elements. In this drawing,

Fig. 1 is a side elevat-ion of the vlock as api plied to a door, the view-being on the inner Y lside of the door. f

Fig. 2 is a view-with rthe inner plate removed, portions of the mechanism being rbroken away to more clearly disclose the construction.

K Fig. 3 is a longitudinal.sectional plan view substantially on line3-3 of Fig. 1.

Fig. Il is a transverse section substantially on line 4--7-4 of Fig. 2.

F ig'. 5 is a plan view of one of the locking 1 discs, the view being that ouV the opposite i side from Fig. 4.

``Fig. 6 is a transverse section through this disc substantially on line 67-6 of Fig. 5, and

Fig. 7 is a detailed sectional vieiv substantially on line 7 7 of Fig. 2'. 'Y

The lock comprises a suitable metal casing 10 set into the door, preferably cast in one piece, but open on the inner side Which is closed by a plate 11. At its outer end 12 it is provided with a rectangular opening 13 for the head 14 of a bolt 15, which bolt is slidable in and out to lock and unlock the door. The body portion 16 of the bolt is preferably substantially cylindrical, as shown in Figs. 4, and 7, and is provided along one side thereof with a row of spaced teeth or projections 17. Extending transversely of the casing is a pair of spaced,

permanently mounted plates 18 having openings 19 therein to guide the bolt, these openings being substantially circular and approximately the size ofl the bolt and are provided with notches 20'in one side thereof for passage of the teeth 17 when the bolt is reciprocated. Suitable means is provided for reciprocating the bolt when it is unlocked, such as a pinion 21, meshing with the teeth 17, and this pinion is operated by the usual knobs 22.

For the purpose of locking the bolt a plurality of discs 23 are provided which are mounted to rotate upon the body portion 16 ofthe bolt, and the rims of these discs project through openings either in the outer Wall of the casing or the plate 11, but preferably thro-ugh both so that they may be operated from either side of the door. Each disc is provided on O-ne side thereof with a centrally located circular recess 24:, preferably extending about halfway through the disc, and mounted in this recess is a locking plate 25. The opening 26 thro-ugh the disc is of sufiicient diameter toy alloW for reciprocation of the bolt in any position of the disc, but the opening 27 in the plate 25 is of substantially thev same dia-meter as that of the body port-ion of the bolt and is pro-vided on one side with a notch 28 for passage of the teeth 17. It Will thus be apparent that should any one of the discs be rotated so that its notch 28 is out of alignment with the teeth 17 the bolt cannot be reciprocated, and in order that the bolt may be reciproc-ated the notches in all of the discs must be in alignment With each other and with the teeth carriedVv by the bolt.

The plater is secured in the recess of the disc by means of a pairV of screws 29 Which pass through openings 3Q in the plates and are threaded into tapped holes 31 in the disc. In the `periphery of each disc are a series offnotv'clies 32 of` lany number desired'. In the present instance I have shown r16 and to facilitate operation of the disc these notchesare placed in outwardly projecting anges Adapted to seat in these recesses are springs 34, one for each disc. and these springs are secured to an inner Wall of the casing and coact With the notches: to yieldi'ngly retain the disc in different positions. The locking plates 25 may be adjusted about the axis of the disc to vary the combinations. In the construction shown there are eight openings in theseings in the disc 23 for the screws, to tliiis reduce the Work required ininanufacturing and also topi-event too great a weakening of the Wallis` of the disc, it is notA necessary j to drill eight holes 1n the disc, four holes" being all that is necessary. -I have shown six holes but sixteen different positions may be'securedY for the plate 18 corresponding to the sixteen differ-ent notches inthe per Ariphery of the disc by means of four holes. For this purpose a' pairy of Vidi'ametrically positioned f holes' 3.5 .are provided yand another pair of v diametri'cally` vpositioned holes 3GY Whichynre -spaced fronrthe holes 35 one half the distance; betifveen the openings in the 1p;late,for when the plate is securedvith the yscrevs Vinl nthe openings the openings 36 may bev .'placedrv half waybetufeenfany tivo lsets of =openingsv BO. Thus it Willi be apparentby 'ha-ving lthc screws in the v.openings 3.5- orv 3G; the plates may be positioned in any/one of sixteenfdife ferent positions; ofn the disc corresponding to sixteen different: positions for the notches 28.

On the Aperipheries. of.-`.the discs, ,spaced distances corresponding to the-distances-o't' the notches 3Q, are provided a number of des ignations 37, which may be either. numbers or figures or anythingelse'desiredfand to" facilitate proper positionii'ig ofntheilisc'sr to bring the notches 28into alignment to unllock the bolt, a point-er 88 is provided. Suitable stops' may also, be provided .toflimit movements of the bolt, as fozrins'tancecotter pins 39. A l

It will apparent :that the l'oclr isfavery simple in construction 'requiring a minimum number of partswa'll ofWhich-arefstrong and durable, and therefore: are not? easily gotten out of order. Inthe'presentSshoiving there are` si); discs `and a locking .plate Qvfor each disc each ofwhi-cn is adapted to cooperate With a tooth orV projection,1T.on..the5bolt to lock it either in theretracted or extended position. As the springs are mounted permanently on the casing and having nothing to do :with the' locking or unlocking of the bolt, itl Will be apparent that thereA is no chance ofitheir indicating to an unauthore ized party when any particular disc4 is in position to bring its notch 2S into alignment With the tooth on the bolt. It will also be apparent that -a large number of different combinations may be secured either by shift ing thel positions of the disc on thebnlt Without changing the positions of the locling. plate 25, bychanging thepositions of these plates without changing thejrelative position ofthe ldiscs or by both. After the bolthas been shifted -it may be'V easilylocked by simply passingf 'the thumb orrffinger over the :discs rotating one or more of them.

VVIIalVing"thus set "forth the nature of my invention, What I claim is:

1. In a Vlock a slidable bolt having a sub` stantially cylindricalportion provided With a plurality ofspaced tee-th projecting` from one side thereof, a plurality ofidiscs mount; j, ed to ,rotate on--said bolt` and eachprovided with a recessfon one side adapted for pas:y

sage of said teeth, a rotatable pinion adaptev l j ed to mesh With said teeth' and means for rotating the pinion to slide the bolt.

2. In a lockfa slidable bolt'ha'ving a plurality of spacedy `proj ections extending' from one side thereof, aplnrality of discs .mountL ed to .rotate on said bolt,saidfdiscs having recesses lon one side thereof, a 4plate seated in said recessesv andlerach provided with an ,sof

opening to substantially fit the boltwjvith,aA

recess inone side thereof for passage of said projections, means forfadjustably securing' the plates in the discs, and means engaging I `the projections, for sliding t-lie.- bolt.

3. In a lock, a sliding bolt havingga pluf rality` of' space-d projections onvone side thereof, a plurality of discs mounted to roy tate on said bolt, la plate carried byeach disc and having. any .opening .through `which thebo-lt passes, said openings having notches in .one side thereof for passage of the pro-r,

jections, said'vplates being provided with af,

plurality of equally. :spaced vopenings for s`e` Y curing screws, saifd discsV being provided with tivo pairs of openings toreceive said.

screws, the openings of. one pair .being f spaced from. those ofthe other-,pairladist'ance. oneah'alffthe distance betweenthje" openings in the plates, and means' lfor :slid: ing-the bolt. i

l. In a lock, a sliding bolt havinga plurality of spaced projections on onefside thereof, a plurality of discs mounted to rotate on `said bolt,'a plate carried by eachl disc and having an opening through which the bolt passes, said openings having notches y in one side thereof for passage of theprojections, saidl plates being pro-vided with a plurality ofV equally spaced openings for securing screws, said discs vbeing provided `with two pairs of openings to receive sai-d screws, the openings of one pairbeing in alignment with a pair of openingsv infthe plate and the openings of the other pair being intermediateY the openings in tl'ieplate and means for reciprocating` .the bolt.

Intestirnony whereof I-afti; my signatur-e,

' HANNIBALE ROMANO, 

